Abstract: A method to adjust a waveform transmitted from a field device to overcome cable bandwidth limitations by passing data to be transmitted through a channel compensation device which pre-distorts data to be transmitted to compensate for the bandwidth limitations. The predistortion may make sure that there is a good quality signal received at the control end of the cable.

Abstract: A system and method are provided for a more accurate bandgap voltage reference wherein the first and second order errors are corrected simultaneously. By using the components included in the correction of the first order error, the second order errors are corrected, advantageously providing less process variability.

Abstract: A MEMS package includes a substrate having an L-shaped cross-section. The substrate includes a vertical portion having a front surface and a back surface, and a horizontal portion protruding from a lower part of the front surface of the vertical portion, wherein the front surface of the vertical portion includes a mounting region. A MEMS die is mounted on the mounting region such that the MEMS die is oriented substantially parallel to the front surface; a lid attached to the front surface of the substrate while covering the MEMS die; and a plurality of leads formed on a bottom surface of the substrate. The leads can extend substantially parallel to one another, and substantially perpendicular to the front surface. The MEMS die can be oriented substantially perpendicular to a PCB substrate on which the package is mounted.

Abstract: An exemplary negative impedance converting circuit for functioning as a voltage buffer and/or negating the impedance of a connected load. The negative impedance converting circuit includes inputs, outputs, a first transconductance stage and a second transconductance stage. The transconductance gain value of the first transconductance stage is greater than a transconductance gain value of the second transconductance stage. Exemplary embodiments of a reference voltage buffer using the negative impedance converting circuit are also described.

Abstract: A switching power supply controller has a nominal loop gain and transient loop gain that is only activated in response to an abrupt load change in one direction. The transient loop gain may be implemented with a series-connected diode and resistor combination arranged in a feedback configuration with an error amplifier. A large load change in one direction may swing the output of the error amplifier and forward bias the diode to create a non-linear gain change.

Abstract: A wireless terminal circuit includes a variable high frequency clock oscillator that provides a high frequency clock signal and a fixed low frequency clock oscillator that provides a low frequency clock signal. A phase-locked loop adjusts a ratio of the frequency of the high frequency clock signal to the low frequency clock signal by adjusting the frequency of the high frequency clock signal. The phase locked loop includes a divider for dividing the high frequency clock signal, the divide ratio of which divider is controlled by a sigma-delta modulator. A wireless terminal local oscillator calibration circuit includes a frequency control circuit including both the high frequency clock oscillator and the low frequency clock oscillator.

Abstract: The invention provides a sensor element formed in a first substrate and having a thermal barrier disposed between the sensor element and a heat source provided elsewhere on the first substrate. The thermal barrier includes at least one pair of trenches formed within the first substrate, individual trenches of the pair being separated by a cavity.

Abstract: A delta signma modulator is programmable to realize a number of different gain settings. A user of the delta sigma modulator (which may be a human or an electronic system) may select a setting among a plurality of available settings. Programmability of gain is realized by selectively controlling the rate of sampling of an analog input relative to the rate of sampling of a reference voltage and/or by controlling interspersing of samples of fixed voltage with the analog input or reference voltage. To effect a positive gain, the rate of sampling of the analog input is selected to the bar larged than that of the rate of sampling of the known reference voltage. Alternatively, or additionally, fixed voltage charge samples are interspersed with the reference. In contrast, to effect a negative gain, the rate of sampling of the analog input is set to be less than the rate of sampling of the reference voltage and/or samples of fixed voltage are interspersed with the analog input.